Jared Kushner, President Trump's son-in-law and adviser, failed to produce the emails when asked by the Senate Judiciary Committee.

Jared Kushner received and forwarded emails regarding WikiLeaks during the presidential campaign — but has failed to hand them over when asked by the Senate Judiciary Committee, according to a report Thursday.

President Trump’s son-in-law and adviser never produced the 2016 missives about the notorious website and “Russian backdoor overture and dinner invite” despite requests from lawmakers, according to a letter sent to Kushner’s lawyers by committee chairman Chuck Grassley (R-Iowa) and ranking Democrat Dianne Feinstein (D-Calif.).

It was revealed last week that Donald Trump Jr. told high-level campaign officials, including Kushner, that he was in contact with WikiLeaks.

(Richard Drew/AP)

“Other parties have produced September 2016 email communications to Mr. Kushner concerning Wikileaks, which Mr. Kushner then forwarded to another campaign official,” the pair wrote. “Such documents should have been produced ... but were not.”

It was revealed last week that Donald Trump Jr. told high-level campaign officials, including Kushner, that he was in contact with WikiLeaks.

Kushner reportedly forwarded the message to campaign communications director Hope Hicks, but has yet to turn over the messages to the panel.

White House Senior Advisor Jared Kushner listens as U.S. President Donald Trump holds a bi-lateral meeting with Saad Hariri, Prime Minister of Lebanon, in the Oval Office.

(Pool/Getty Images)

Grassley and Feinstein chastised Kushner for also withholding phone records and omitting other communications mentioning people connected to the panel’s investigation into Russian meddling in the presidential election.

“If, as you suggest, Mr. Kushner was unaware of, for example, any attempts at Russian interference in the 2016 presidential election, then presumably there would be few communications concerning many of the persons identified,” the lawmakers wrote.

Kushner reportedly turned over a trove of documents to Mueller’s team earlier this month.

(Kevin Lamarque/REUTERS)

It was revealed in July that Kushner, along with Donald Trump Jr. and then-Trump campaign chairman Paul Manafort, attended a summer 2016 meeting at Trump Tower with a Russian lawyer who had promised dirt on former Democratic presidential candidate Hillary Clinton.

Trump Jr. is reportedly under scrutiny by special counsel Robert Mueller for his contacts with WikiLeaks and Russian agents who sought to sway the election in favor of his father.

Grassley and Feinstein, who said they have yet to receive access to Kushner’s interview with the Senate intelligence committee, also pushed back on his attorney’s claim that certain documents related to his security clearance are confidential.

“Moreover, with regard to your claim that the documents are confidential, while the Privacy Act limits the government’s authority to release the information provided to it, there is no restriction on your client's ability to provide that information to Congress,” they wrote.